...Underground. Documentary series. Rob Bell discovers how London's overcrowding problem prompted the unthinkable transport innovation that was the underground. (S1 Ep 3)[S]
...Underground. Documentary series. Rob Bell unearths the history of the Central Line, learning that the platforms are curved to avoid the Bank of England's vaults. (S1 Ep 2)[S]
...Underground. Documentary series. Rob Bell reveals the obstacles encountered and the innovations pioneered by the Victorian engineers who built the Northern Line. (S1 Ep 1)[S]